flush helper count writes instead of time

include/c11log/details/flush_helper.h

@@ -1,36 +1,31 @@
 #pragma once
-#include <chrono>
-#include <iostream>
 // Flush to file every X writes..
 
 namespace c11log
 {
 namespace details
 {
+
 class file_flush_helper
 {
 public:
-    explicit file_flush_helper(const std::chrono::milliseconds &flush_every): _flush_every(flush_every), _last_flush() {};
+    explicit file_flush_helper(const std::size_t flush_every):
+        _flush_every(flush_every),
+        _write_counter(0) {};
 
-    void write(std::ofstream& ofs, const std::string& msg) {
-
-
-        ofs << msg;
-        //If zero - flush every time
-        if(_flush_every == std::chrono::milliseconds::min()) {
+    void write(std::ofstream& ofs, const std::string& msg)
+    {
+        ofs.write(msg.c_str(), msg.size());
+        if(++_write_counter == _flush_every)
+        {
             ofs.flush();
-        } else {
-            auto now = std::chrono::system_clock::now();
-            if(now - _last_flush >= _flush_every) {
-                ofs.flush();
-                _last_flush = now;
-            }
+            _write_counter = 0;
         }
     }
 
 private:
-    std::chrono::milliseconds _flush_every;
-    std::chrono::system_clock::time_point _last_flush;
+    const std::size_t _flush_every;
+    std::size_t _write_counter;
 };
 }
 }